Exam 10: Additional Topics in Probability

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A random variable X has a distribution given by f(1)= 0.6,f(2)= 0.2,f(3)= 0.2.The mean of X is

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An urn contains 4 red and 6 green marbles.Two marbles are successively drawn at random with replacement and the number of red marbles,X,is observed.Construct the probability histogram for X.

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Suppose that you pay $1 to play a game in which a pair of fair dice are rolled.For each 2 that shows on a die you receive $2.To the nearest cent,your expected loss on each play is

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n = 46; p = n = 46; p =

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A random variable X has a distribution given by f(0)= 0.3,f(1)= 0.2,f(2)= 0.5.(a)Find μ.(b)Find Var(X).

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